.notice{
	position: absolute;
	width: 640px;
	height: 250px;
	top: 750px;
	left: 400px;
	opacity: 0;
	border-radius: 5px;
	background-color: cadetblue;        /* 颜色可调 */
	color: aliceblue;
}
.notice_title{
	position: absolute;
	font-size: 24px;
	top: -5px;
	left: 43%;
}
.title_line{
	position: absolute;
	width: 100%;
	top: 20px;
}
.notice_content{
	position: absolute;
	width: 80%;
	height: 210px;
	top: 50px;
	left: 10%;
	font-size: 18px;
}
.bool_link:hover{
	color: black;
}